Top 80+ Solved Molecular Basis of Inheritance MCQ Questions Answer
Q. Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a “triplet” (AIPMT - 2009)
a. Hershey and chase
b. Morgan and sturtevant
c. Beadle and Tatum
d. Nirenberg and Mathai
Q. Select the two correct statement out of the four statement given below about “ Lac opern”(AIPMT-2010)(i) Glucose or galactose may bind with the repressor and inactivate it(ii) In the absence of lactose the repressor bind with the operator region(iii) The Z -gene codes for permease(iv) This was elucidated by Francois Jacob and Jacques MonodThe correct statements are
a. ii and iii
b. i and iii
c. ii and iv
d. i and ii
Q. Which one of the following does not follow the central dogma of molecular biology ? (AIPMT - 2010)
a. Pea
b. Mucor
c. Chlamydomonas
d. HIV
Q. The lac opern consists of (AIPMT - 2010)
a. four regulatory genes only
b. One regulatory gene and three structural genes
c. Two regulatory genes and three structural genes
d. three regulatory genes and three structural genes
Q. The 31 - 51Phosphodiester linkages inside a potynucleotide chain serve to join AIPMT - 2010)
a. One DNA strand with the other DNA strand
b. One nucleoside with another nucleoside
c. One nucleotide with another nucleotide
d. One nitrogen base with pentose sugar
Q. If one strand of DNA has the nitrogenous base sequence as ATCTG, What would be thecomplementary RNA strand Sequence (AIPMT - 2012)
a. TTAGU
b. UAGAC
c. AACTG
d. ATCGU
Q. Semiconservative DNA replication using 15 N was demonstrated by (AIIMS -1994)
a. Meselson
b. Taylor
c. Meselson and stahl
d. Hershey and chase
Q. In operan concept, the operator gene combines with (AIIMS -1986)
a. Regulator protein to switch off structural gene transcription
b. Regulator protein to switch on structural gene transcription
c. Inducer to switch off structural gene transcription
d. Regulator gene to switch off structural gene transcription
Q. Termination of polypeptide chain is brought about by
a. UUG , UAG and UCG
b. UAA , UAG and UGA
c. UUG , UGC and UCA
d. UCG , GCG and ACC
Q. RNA that picks up specific aminoacid from amino acid pool of cytoplasm to carry it to ribosome during protein synthesis is
a. t RNA
b. m RNA
c. r RNA
d. g RNA
Q. Correct sequenceof code transfer during polypeptide formation is (AIIMS -1999)
a. DNA , mRNA , t RNA and amino acids
b. DNA , t RNA , r RNA and m RNA
c. m RNA , t RNA , DNA and amino acids
d. r RNA , DNA ,m RNA and t RNA
Q. Best method to determine paternity is
a. Protein analysis
b. chromosome counting
c. gene counting
d. DNA finger printing
Q. DNA is copied from m-RNA molecule with help of
a. Restriction enzyme
b. Reverse transcriptase
c. DNA polymerase
d. Adenosine deaminase
Q. Nucleotide arrangement in DNA can be seen by
a. X - ray crystallography
b. Electron microscope
c. Ultra centrifuge
d. Light microscope